/Engine/Source/Developer/DesktopPlatform/Public/IDesktopPlatform.h
Enumerates all the registered engine installations.
void EnumerateEngineInstallations ( [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [FString](API\Runtime\Core\Containers\FString) > & OutInstallations )